干旱区生态环境知识资源中心(Arid): Spatial and long-term analysis of rainwater chemistry over the conterminous United States

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DOI	10.1016/j.envres.2020.109872
	Spatial and long-term analysis of rainwater chemistry over the conterminous United States
	Keresztesi, Agnes; Nita, Ion-Andrei; Boga, Reka; Birsan, Marius-Victor; Bodor, Zsolt; Szep, Robert
通讯作者	Szep, R
来源期刊	ENVIRONMENTAL RESEARCH
ISSN	0013-9351
EISSN	1096-0953
出版年	2020
卷号	188
英文摘要	A comprehensive analysis of the chemical composition of precipitation was performed on rainwater samples collected between 1978 and 2017 over the conterminous US. A total of 86470 data records downloaded from the National Atmospheric Deposition Program were statistically analyzed and assessed in terms of precipitation chemistry. The ion abundance followed the Cl- > Na+ > SO42- > Ca2+ > H+ > NH4+ > NO3- > Mg2+ > HCO3- >K+ downward trend, showing that chloride and sodium were the most dominant among anions and cations. Ca2+, SO42- and NH4+ concentrations were notable in desert areas or in regions with significant anthropogenic activity. Frequency analysis of pH values showed that the 87.90% of the pH is acidic, exhibiting values under 5.6. According to the acidifying and neutralization potential, rainwater pH is mostly alkaline in the Western region, presenting acidic values in highly industrialized areas, in the Central and Eastern Regions. Fractional acidity showed that in the majority of the studied sampling sites 61% of the acidity in precipitation is neutralized, due to the presence of the main neutralizing agents (NH4+, Ca-2(+), Na+), fact sustained by the neutralization factor values. The relationship between acidic and alkaline components was thoroughly examined by ionic ratios and the ammonium availability index. Wet deposition rates of major ions confirmed the dominance of acidic species over neutralizing ones, as well as the significant imprint of regional climate and heavily industrialized areas on the precipitation chemistry. The complex major ion source apportionment, including marine and crustal enrichment factors, sea salt and non-sea salt fractions, Spearman's rank correlation analysis and Principal Component Analysis, showed that anthropogenic influences are the most significant, including coal-fired power plants, oil refineries, major industries and agricultural activities. Crustal and marine sources also presented a prominent imprint on the rainwater chemistry of the conterminous US.
英文关键词	Rainwater Chemical composition Neutralization Wet deposition Source apportionment
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000564658500001
WOS关键词	CHEMICAL-COMPOSITION ; PRECIPITATION CHEMISTRY ; EASTERN CARPATHIANS ; URBAN SITE ; ATMOSPHERIC CIRCULATIONS ; ANTHROPOGENIC INFLUENCES ; TERRESTRIAL SOURCES ; WET DEPOSITION ; NITROGEN ; AEROSOL
WOS类目	Environmental Sciences ; Public, Environmental & Occupational Health
WOS研究方向	Environmental Sciences & Ecology ; Public, Environmental & Occupational Health
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325937
作者单位	[Keresztesi, Agnes; Boga, Reka; Szep, Robert] Univ Pecs, Fac Nat Sci, Doctoral Sch Chem, Ifjusag 6, H-7624 Pecs, Hungary; [Keresztesi, Agnes; Boga, Reka; Bodor, Zsolt; Szep, Robert] Sapientia Hungarian Univ Transylvania, Fac Econ Sociohuman Sci & Engn, Dept Bioengn, Piata Libertatii 1, Miercurea Ciuc 530104, Romania; [Keresztesi, Agnes; Szep, Robert] Inst Res & Dev Hunting & Mt Resources, Progresului 35B, Miercurea Ciuc 530240, Romania; [Nita, Ion-Andrei] Alexandru Ioan Cuza Univ, Fac Geog & Geol, Doctoral Sch Geosci, Bulevardul Carol I 11, Iasi 700506, Romania; [Nita, Ion-Andrei; Birsan, Marius-Victor] Meteo Romania Natl Meteorol Adm, Dept Res & Infrastruct Projects, Sos Bucuresti Ploiesti 97, Bucharest 013686, Romania
推荐引用方式 GB/T 7714	Keresztesi, Agnes,Nita, Ion-Andrei,Boga, Reka,et al. Spatial and long-term analysis of rainwater chemistry over the conterminous United States[J],2020,188.
APA	Keresztesi, Agnes,Nita, Ion-Andrei,Boga, Reka,Birsan, Marius-Victor,Bodor, Zsolt,&Szep, Robert.(2020).Spatial and long-term analysis of rainwater chemistry over the conterminous United States.ENVIRONMENTAL RESEARCH,188.
MLA	Keresztesi, Agnes,et al."Spatial and long-term analysis of rainwater chemistry over the conterminous United States".ENVIRONMENTAL RESEARCH 188(2020).